Maundrel

A foolish, vapouring gossip. The Scotch say, “Haud your tongue,
maundrel.” As a verb it means to babble, to prate. In some parts of
Scotland the talk of persons in delirium, in sleep, and in intoxication
is called maundrel. The term is from Sir John Mandeville, the
traveller, who published an account of his travels, full of idle gossip
and most improbable events.

There is another verb, maunder (to mutter, to vapour, or
wander in one's talk). This verb is from maund (to beg). (See Maundy Thursday.)